PlantTFDB
Plant Transcription Factor Database
v4.0
Previous version: v1.0, v2.0, v3.0
Lactuca sativa
B3 Family
Species TF ID Description
Lsa000502B3 family protein
Lsa000631B3 family protein
Lsa001189B3 family protein
Lsa001825B3 family protein
Lsa002976B3 family protein
Lsa003619B3 family protein
Lsa003643B3 family protein
Lsa004077B3 family protein
Lsa004307B3 family protein
Lsa004420B3 family protein
Lsa007455B3 family protein
Lsa008094B3 family protein
Lsa008663B3 family protein
Lsa009179B3 family protein
Lsa009214B3 family protein
Lsa009635B3 family protein
Lsa011356B3 family protein
Lsa011382B3 family protein
Lsa013196B3 family protein
Lsa014465B3 family protein
Lsa016616B3 family protein
Lsa017916B3 family protein
Lsa017998B3 family protein
Lsa018449B3 family protein
Lsa008481B3 family protein
Lsa012294B3 family protein
B3 Family Introduction

The plant-specific B3 superfamily encompasses well-characterized families, such as the auxin response factor (ARF) family and the LAV family, as well as less well understood families, such as RAV and REM.

All members of the B3 superfamily contain an ~ 110 amino acid region called the B3 domain. This domain was initially named because it was the third basic domain in the maize gene VIVIPAROUS1 (VP1). The first and second basic domains (B1 and B2) are specific to the VP1-like proteins, but genes that contain the B3 domain are widespread in plant genomes. The B3 domain of VP1 encodes a sequence-specific DNA binding activity.

Swaminathan K, Peterson K, Jack T.
The plant B3 superfamily.
Trends Plant Sci, 2008. 13(12): p. 647-55.
PMID: 18986826

Note: In plantTFDB, B3 family includes LAV family, REM family, and RAV family (those do not contain AP2 domain).